Electric slow cooker base



FIG. 1 is a front perspective view of a base for electric slow cooker base embodying our new design;

FIG. 2 is a right elevational view thereof;

FIG. 3 is a left elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a electric slow cooker base, as shown. 